I have mistakenly changed my wireless network settings on my DELL XPS M1330. I see my wireless router on teh netowrk list but it now has a red x against it and an error message 'the settings saved on this computer for the network do not match the requirements of the network' I also have a small samsung NC10 and it is connected OK so I know the router is working fine.

Go to the below site and download the drivers you need.

http://www.dell.com/support/home/us/en/19/product-support/product/xps-m1330/drivers

WHEN YOU START YOUR COMPUTER. GOTO BIOS SETTINGS . FIND KEYBOARD SETTINGS AND CHANGE THE OPTION TO USE FN KEY.

The best way to fix the issue is to perform System Recovery. I recommend you to take the backup of your data as recovery will erase the complete data. You can restore the backup data after performing recovery.
Visit the below link for more information on how to perform recovery
http://notebook-solutions.blogspot.com/2009/06/performing-system-recovery-in-vista.html

If your running xp, make sure the netowrk card is not disabled, make sure you rnot using a cross over cable. use the cable you got with the routers. Try reinstalling the network card, goto dell support andenter you model to get the drivers.

1 thing to check. goto start ,control panel.
double click on netowrk conections.
right click on the main conection witch is the card in your pc, goto properties. andin the list internet protocol (tcp/ip) click this. and pres properties.

make sure in here obtain ip addres is automatically. and obtain dns is auto too.

Try this let me know how you get on.

For that first turn on the wi fi switch on laptop.
Then right click on my netowrk places then make sure your wi fi adpater is there enable it then right click on it then click on biewe available networks.
If it not show netowrk then you have to enable wireless in router.
For that first connect wi fi router to computer then access it with following link.
http://192.168.1.1

or
http://192.168.0.1
Type user as "admin" and password as "admin" or blank or "password"
then go to wireless and enable it .
Then save settings and restart router then check.
Make sure wi fi driver is installed in laptop.
Let me know if you need more assistance.
Thanks.

1) double click on the wireless network icon on the status bar
2) click on View wireless network
3) click on change advance settings
4) go to wireless networks
5) under the preferred networks, remove the SSID
6) try to connect again

pls send my wireless installer dell centrino xps m1330

Refresh the network list from WZC and check if the network exists. Check the signal strength from the utility. check for any interference. Try using a different channel . As a last step try upgrading the drivers.

when enabling wireless security the router and adapter must be both be configured and configured in a fashion that both support. If you need help provide confirmation of your wireless router's manufacturer and model and the same information for any wireless adapters or computers with built-in wireless adapters to be wirelessly connected.

This will allow us to determine the common security options for all wireless devices you have.

What operating system do you have running on the Dell? Is there a hardware/software firewall setup/installed?